Kim Jin-woo , Kim Seung-jung , Lee Bo-seaub

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Abstract

A new method for liquid chromatography with post column reaction is suggested for the separation and quantification of tertiary amines. A mixture of triethanolamine and N-ethyl diethanolamine was separated by a strong cation exchange column, followed by spectrophtometric detection of the blue colors generated from the reaction of each amine with the Folin-Ciocalteau reagent. The tertiary amines were properly separated when an eluent of pH 9.5 containing 0.5M sodium nitrate was used. Under this condition, calibration curve of triethanolamine in 2-10mg/ 100ml concentration range was attained. Good results were obtained when cream and shampoo preparations containing known amount of triethanolamine were analysed accoring to this method. In case the samples did not contain any other interfering reducing substances, the amine was quantitatively determined by the simple reaction of the samples with Folin-Ciocalteau reagent, and the subsequent spectrophotometric measurement.

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Kim Young-dae , Kim Chang-kew , Lee Chung-nam , Ha Byung-jo

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Abstract

A new quaternary ammonium compound, hydrolyzed ginseng-sapoin quaternary (HGSQ), from hydrolyzed Korean ginseng-saponin and 2, 3-epoxypropyltrimethyl ammonium chloride has been developed as a conditioning agent for hair care products. This structure has the hydrophilic group from the introduced cationic and the hydrophobic group from the aglycone of ginseng saponin. Its cationic site allows the molecule to be more substantive than ginseng saponin. Its properties: surface tension, conductivity, critical micelle concentration, eye irritation, sorption onto hair, force reduction (%) for 20% extension and moisture retention effect comparing with the commercial standards. Also half-head tests of HGSQ-containing shampoo were carried out to compare the conditioning effects in shampoos.

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강학희

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Abstract

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양창모 , 반수호

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주종대 Ju Jung-dae , 유용호 Yu Yong-ho , 김상돈 Kim Sang-done

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Abstract

Axial dispersion and dispersed phase holdup characteristics of a reciprocating plate extraction column in which six different plate arrangement have been investigated. The axial dispersion coefficient were correlated in terms of A² f which has the same dimension of axial dispersion cofficient. The minimum value of A₂ f increased with increase in free opening area fraction of plate. Dispersed phase holdup increased with the continuous phase velocity but it was relatively insensitive to changes in the dispersed phase velocity. Dispersed phase hold up decreased with an increase in free opening area fraction of plate.

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박운종

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Abstract

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